The study, published in The Journal of Sexual Medicine, focused on 2,435 Italian male patients who sought outpatient treatment for sexual dysfunction between 2001 and 2007. Among participants, 41.5% were normal weight, 42.4% were overweight, 12.1% were obese, and 4% were severely obese. The mean age was 52.

Giovanni Corona, MD, from the University of Florence, and colleagues found that the degree of obesity correlated with decrease in testosterone level. Among study participants, the more the severe the obesity, the lower the level of testosterone.